Embolism device and spring coils thereof

Abstract

An embolization device and a coil thereof ( 10, 20, 30 ) are disclosed. The coil ( 10, 20, 30 ) is formed by joining together at least four structural elements arranged in different planes, which include at least two C-shaped elements ( 12 ) and at least one O-shaped element ( 13 ) or Ω-shaped ( 11 ) element. The at least two C-shaped elements ( 12 ) are arranged in two adjacent planes and are sequentially joined together to form an S-shaped structure. The embolization device preferably includes plurality of coils ( 10, 20, 30 ) which are joined together side-by-side and end-to-end, wherein in any adjacent two coils ( 10, 20, 30 ), one is swivelable about an axis of the embolization device with respect to the other. The Ω-shaped element is structurally stable, allowing the coil ( 10, 20, 30 ) to maintain good structural stability. At the same time, the three-dimensional S-shaped structure has good deflectability, which imparts high compliance to the coil ( 10, 20, 30 ). With this construction, the coil ( 10, 20, 30 ) can satisfy the requirements of both stable basket formation and compliant packing and can adapt to various aneurysms of different shapes and sizes with a dense packing effect.

1 . A coil formed by joining together at least four structural elements arranged in different planes, wherein the at least four structural elements include at least two C-shaped elements and at least one O-shaped or Ω-shaped element, and wherein the at least two C-shaped elements are arranged in two adjacent planes and are sequentially joined together to form an S-shaped structure. 
     
     
         2 . The coil of  claim 1 , wherein the two adjacent planes where the S-shaped structure is arranged form an angle of 60°-120°. 
     
     
         3 . The coil of  claim 2 , wherein the angle formed by the two adjacent planes where the S-shaped structure is arranged is 90°. 
     
     
         4 . The coil of  claim 1 , wherein the Ω-shaped element has an arc length greater than or equal to 75% and smaller than 100% of a complete circumference, and wherein the C-shaped element has an arc length greater than or equal to 50% and smaller than 75% of a complete circumference. 
     
     
         5 . The coil of  claim 1 , wherein a total number of the structural elements is six, and wherein a number of the C-shaped elements is two. 
     
     
         6 . The coil of  claim 5 , wherein the six structural elements make up a hexahedron, and wherein one Ω-shaped element is arranged on each of three axes of the hexahedron. 
     
     
         7 . The coil of  claim 5 , wherein the coil is formed by sequentially joining O-shaped, Ω-shaped, C-shaped, C-shaped, Ω-shaped and Ω-shaped elements, which are respectively arranged in different planes. 
     
     
         8 . The coil of  claim 1 , wherein a total number of the structural elements is eight, and wherein a number of the C-shaped elements is six. 
     
     
         9 . The coil of  claim 8 , wherein the coil is formed by sequentially joining O-shaped, C-shaped, C-shaped, C-shaped, C-shaped, C-shaped, C-shaped and Ω-shaped elements, which are respectively arranged in different planes. 
     
     
         10 . The coil of  claim 1 , wherein the coil is formed by winding a tubular body. 
     
     
         11 . The coil of  claim 10 , wherein the tubular body is made of a metal, alloy or polymer filament and is wound into a spiral. 
     
     
         12 . An embolization device comprising at least one coil, wherein the coil is formed by joining together at least four structural elements arranged in different planes, wherein the at least four structural elements include at least two C-shaped elements and at least one O-shaped or Ω-shaped element, and wherein the at least two C-shaped elements are arranged in two adjacent planes and are sequentially joined together to form an S-shaped structure. 
     
     
         13 . The embolization device of  claim 12 , wherein the embolization device comprises a plurality of coils, wherein the plurality of coils are joined together side-by-side and end-to-end, and wherein in any adjacent two coils, one coil is swiveled about an axis of the embolization device with respect to the other coil. 
     
     
         14 . The embolization device of  claim 13 , wherein in any adjacent two coils, one coil is swiveled about the axis of the embolization device with respect to the other coil by an angle of 0°-90°. 
     
     
         15 . The embolization device of  claim 12 , wherein the structural element arranged at a furthermost end of the embolization device is the O-shaped element. 
     
     
         16 . The coil of  claim 12 , wherein the two adjacent planes where the S-shaped structure is arranged form an angle of 60°-120°. 
     
     
         17 . The coil of  claim 16 , wherein the angle formed by the two adjacent planes where the S-shaped structure is arranged is 90°. 
     
     
         18 . The coil of  claim 12 , wherein the Ω-shaped element has an arc length greater than or equal to 75% and smaller than 100% of a complete circumference, and wherein the C-shaped element has an arc length greater than or equal to 50% and smaller than 75% of a complete circumference. 
     
     
         19 . The coil of  claim 12 , wherein a total number of the structural elements is six, and wherein a number of the C-shaped elements is two. 
     
     
         20 . The coil of  claim 19 , wherein the six structural elements make up a hexahedron, and wherein one Ω-shaped element is arranged on each of three axes of the hexahedron.